Note: Descriptions are shown in the official language in which they were submitted.
87265714
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Improvements relating to smoking article assembly
Field
This is a divisional application of Canadian National Phase Patent Application
No. 2,837,243, filed on 15t June, 2012.
This invention relates to smoking article assembly and associated machinery.
In particular,
but not exclusively, it relates to a cigarette assembling machine comprising a
plurality of
modules.
Background
Known filter cigarette assembling machines comprise a filter attachment unit
for attaching
a filter and tobacco rod to form a filter cigarette. In a known filter
attachment unit, a
"double length" filter rod (also called a "2-up" rod) is aligned with two
tobacco rods at
either end, and the three rods are wrapped with a wrapper known as a "tipping
paper" so
as to join them together. The centrally positioned 2-up filter rod is then cut
into two so as
to form two filter cigarettes. This process is well known per se to those
skilled in the art.
Known filter rods and tobacco rods are conveyed in a filter attachment unit by
a plurality
of cylindrical drums, with rod articles passing from drum to drum as they are
conveyed
through the unit. Known drums have a plurality of grooves for holding rod
articles during
transport, the grooves being spaced around the curved periphery of a drum,
with each
groove extending in the direction of the drum axis.
Certain drums are configured so that particular operations are carried out as
the rod articles
are conveyed by the drum. For example known filter attachment machines include
a swash
plate drum for longitudinally compressing two tobacco rods and a 2-up filter
rod before
tipping paper is applied, and a rolling drum which co-operates with a roll
hand to wrap a
tipping paper segment around the three rods. Other known drums include cutting
drums
which cooperate with a cutting knife to cut rod articles, separating drums for
separating rod
articles, inspection drums to inspect for the presence of filters or to carry
out a leakage test,
laser drums to burn small perforations in filter rods, and turning drums to
change the
orientation of cigarettes. Other known drums include transfer drums (also
referred to as
"intermediate drums"), takeover drums and feed drums. Known filter attachment
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machines also include a tipper unit for supplying individual cut segments of
tipping paper
(known as tipping "patches") and a glue unit for applying glue to the tipping
paper.
Summary
In accordance with various embodiments of the present invention, a modular
apparatus for
smoking article assembly is provided. The modular apparatus is configured to
receive rods
of smokeable material and to cause said received rods of smokeable material to
undergo a
first sequence of operations, wherein the modular apparatus can be
reconfigured so as to
cause received rods of smokeable material to undergo a second sequence of
operations,
different to the first sequence of operations, wherein the first and second
sequences of
operations respectively form at least part of first and second processes for
assembling
smoking articles, each smoking article comprising a said rod of smokeable
material, which
is smoked in use.
The modular apparatus may comprise a first rod inserter configured to insert a
first rod
article between two tobacco rods, a first rod divider configured to divide the
first rod
article into two segments, a rod separator configured to separate a first
group comprising a
rod of smokeable material and one of said segments from a second group
comprising a rod
of smokeable material and another of said segments, and a second rod inserter
configured
to insert a second rod article between the first and second groups.
According to embodiments of the invention, a flexibly configurable smoking
article
assembly apparatus is provided which facilitates changes in the assembly
process.
The flexibly configurable apparatus may also provide a useful tool in product
development.
Rather than designing and building a dedicated machine for carrying out a
particular
sequence of assembly operations, the modular apparatus may be configured to
carry out
the sequence. Thus, the time and cost to develop new products may be reduced.
Some of the operations of the first sequence of operations may be included in
the second
sequence of operations. In some examples, the first and second sequences may
differ by
only one operation. Alternatively, the second sequence of operations may
include all of the
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operations of the first sequence, and may differ in that the second sequence
includes one or
more further operations not included in the first sequence. Alternatively, the
first and
second sequences may each consist of the same operations, arranged in a
different order.
For example, the first and second sequences may differ in that the position of
two
.. operations in the first sequence is interchanged in the second sequence.
Alternatively, in
some examples, none of the operations in the first sequence may be included in
the second
sequence.
The modular apparatus may comprise a first module comprising said first
inserter and a
.. second module comprising said second inserter.
The modular apparatus may further comprise a second rod divider configured to
divide the
second rod article into two segments. The modular apparatus may further
comprise a
wrapping station configured to wrap a wrapper at least partially around an
inserted rod
article after the inserted rod article is inserted between the two tobacco
rods and before the
inserted rod article is divided by a rod divider. The said inserted rod
article may comprise
said first rod article inserted by said first inserter, or said second rod
article inserted by said
second inserter.
The modular apparatus may comprise a plurality of rod inserters, each said rod
inserter
being configured to insert a rod article between two tobacco rods. The modular
apparatus
may include a plurality of rod dividers, each said rod divider being
configured to divide a
rod article into two segments. The modular apparatus may include a plurality
of wrapping
stations, each said wrapping station being configured to wrap a wrapper at
least partially
around an inserted rod article after the rod article is inserted between two
tobacco rods and
before the inserted rod article is divided by a rod divider.
Preferably, the first process for assembling smoking article forms a first
configuration of
smoking article and the second process for assembling smoking articles forms a
second
configuration of smoking article different to the first configuration.
The modular apparatus may therefore facilitate changes in the type of
cigarette produced.
Thus, rather than having separate dedicated machines in a factory to produce
different
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types of cigarette, a single flexible machine is provided. In this way, floor
space in the
factory can be saved.
The first and second sequences of operations may cause rods of smokeable
material to be
respectively combined with one or more rod articles such as filter rods.
Preferably each rod of smokeable material comprises a tobacco rod.
The modular apparatus may include a plurality of modules. The modules may
comprise a
plurality of functional units configured to cause said rods of smokeable
material to undergo
said first sequence of operations.
Some functional units may for example comprise a conveying element such as a
drum, e.g:
a swash plate drum, rolling drum, cutting drum, separating drum or transfer
drum. The
modules may also include functional units other than drums, for example a
tipper unit or
glue unit.
The drums are preferably arranged to define a conveyance path through the
modular
apparatus, along which rods of smokeable material are caused to undergo said
first
sequence of operations.
Reconfiguring the modular apparatus may comprise repositioning modules
relative to one
another. Alternatively, or in addition, one or more further modules may be
added.
Alternatively, or in addition, one or more of the modules may be removed.
In some cases where manufacture of a desired cigarette configuration is
required, this may
be achieved by adding only one further module to the modular apparatus, or by
replacing
only one module with another module.
The modules may include one or more reconfigurable modules. Reconfiguration of
the
modular apparatus may comprise reconfiguring a reconfigurable module.
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When reconfigured, the modular apparatus preferably comprises a plurality of
modules,
said plurality of modules comprising a plurality of functional units (e.g:
drums) configured
to define a conveyance path and cause rods of smokeable material to undergo
said second
sequence of operations.
Preferably, modules are arranged in a row to cause said rods of smokeable
material to
undergo said first and second sequences of operations. Preferably, the modules
are
arranged in a row by being arranged in a straight line. However, optionally,
the modules
may be arranged in a row by being arranged in a curved line.
At least one module may be left unchanged when the modular apparatus is
reconfigured
for said second sequence of operations. For example, an in-feed module
configured to
receive rods of smokeable material may be configured in the same position and
in the same
way before and after reconfiguration of the modular apparatus.
The modular apparatus may comprise a first group-forming apparatus configured
to
associate a rod of smokeable material with a first rod article to form a first
group, and a
second group-forming apparatus configured to associate a second rod article
with the first
group to form a second group. The first group-forming apparatus may be
included in a
first module and the second group-forming apparatus may be included in a
second module.
The modular apparatus may include one or more modules which are linked to a
rod
attachment unit. Suitable rod attachment units may for example comprise one of
a "Max
S" unit from Hauni Maschinenbau, a "Max 90" unit, also from Hauni
Maschinenbau, or a
GD AF12 unit. Other suitable rod attachment units include M5 or M8 filter tip
attachment
units from Hauni, the GD 121 filter attachment unit, or similar machines.
Those skilled in
the art will appreciate that other rod attachment units could alternatively be
used.
One or more of said rod inserters may be included in the rod attachment unit.
The rod
attachment unit may be configured to receive at least a tobacco rod from a
module of the
the modular apparatus, directly or indirectly, and to couple a rod article to
the tobacco rod
to form a smoking article.
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According to various embodiments, a smoking article assembling apparatus
comprising one
or more modules of the modular apparatus is provided.
The smoking article assembling apparatus may comprise a tobacco rod source.
The
tobacco rod source may comprise a tobacco rod making unit. Alternatively, the
tobacco
rod source may comprise a tobacco rod hopper. The modular apparatus may be
arranged
to receive tobacco rods from the tobacco rod source, directly or indirectly.
At least one of the modules of the modular apparatus may be a reconfigurable
module
comprising a base unit configured to removably receive a plurality of
different parts. The
module may comprise a drum-receiving portion adapted to selectively receive
first and
second drums. The module may comprise a suction control element configured to
apply
suction to either the first or second drum.
The modular apparatus may comprise some modules which are each configured to
receive
the same number of drums positioned in the same way. There may be two or more
of
such modules (e.g: two or more reconfigurable modules). Although the number of
drums
and their position may be the same for these modules, the drums may be of
different types
depending on the desired configuration of the modules, so that the
functionalites of
similarly positioned drums may be different for different modules. In
embodiments, all of
the modules of the modular apparatus may be configured to receive the same
number of
drums, positioned in the same way, with the exception of an initial infeed
module, which
may have a different number of drums.
Each module may comprise a base unit and two or more drums. One or more of the
modules may have four drums, or alternatively less than four drums. One or
more
modules may have more than four drums.
The present invention also provides a kit of parts to assemble the modular
apparatus. The
kit of parts preferably comprises a plurality of modules.
The present invention also provides a method of reconfiguring the modular
apparatus,
comprising repositioning modules relative to one another and/or removing one
or more
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modules and/or adding one or more modules and/or reconfiguring one or more of
the
modules.
The invention also provides an assembler to assemble a smoking article by
coupling one or
more rod articles to a rod of smokeable material which is smoked in use,
comprising a first
wrapping station to apply a first wrapper to the smoking article and a second
wrapping
station to apply a second wrapper to the smoking article after the first
wrapper has been
applied.
A first module may comprise the first wrapping station and a second module may
comprise
the second wrapping station.
As used herein the term "rod article" includes rods of smokeable material such
as tobacco
rods, filter rods, and also other rod-like articles suitable for inclusion in
a smoking article.
A rod article may be formed of a single rod, or alternatively may comprise two
or more
segments.
As used herein the term "filter rod" refers to a rod comprising material
suitable for
removing certain elements from smoke. The filter rod may be longer than filter
elements
of the eventual cigarettes. For example, the filter rod may be a "2-up" or "4-
up" rod,
which is divided into segments during cigarette assembly, each segment being
coupled with
one tobacco rod in the eventual cigarette. As is known in the art, "2-up
filter rod" refers to
a filter rod which is intended to be divided into two segments and "4-up
filter rod" refers
to a filter rod which is intended to be divided into four segments. Similarly,
"6-up filter
rod" refers to a filter rod which is intended to be divided into six segments.
As used herein, the term "smoking article" includes smokeable products such as
cigarettes,
cigars and cigarillos whether based on tobacco, tobacco derivatives, expanded
tobacco,
reconstituted tobacco or tobacco substitutes and also heat-not-burn products.
The smoking
article may be provided with a filter for the gaseous flow drawn by the
smoker.
Brief Description of the Drawings
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In order that the invention may be more fully understood, embodiments thereof
will now
be described, by way of example only, with reference to the accompanying
drawings, in
which:
Figure 1 is a schematic showing elements of a cigarette manufacturing
apparatus.
Figure 1A shows a module of a first type.
Figure 2 shows a module of a second type;
Figure 3 shows a module of a third type;
Figure 4 shows a module of fourth type;
Figure 5 shows an arrangement of modules;
Figure 6a shows a Max S unit;
Figure 6b illustrates a modification to a Max S unit;
Figure 7 shows an arrangement of modules linked to the modified Max S unit for
making a
first type of cigarette, and Figure 7a illustrates the corresponding cigarette
assembly
process.
Figure 8 shows an arrangement of modules for making a second type of
cigarette, and
Figure 8a illustrates the corresponding cigarette assembly process.
Figure 9 is a perspective view of the base unit of the modules of Figure 2, 3
and 4 mounted
with four drums.
Figure 10 is the perspective view of Figure 9, with one drum removed.
Figure 11 is a schematic illustrating the regions where suction is applied to
the drums, and
the direction of rotation of the drums;
Figure 12 is the perspective view of Figure 10 with a suction control element
and suction
housing removed.
Figure 13 is view of the base unit of Figure 9 from behind.
Figure 14 illustrates a variation of the module of Figure 1A.
Detailed Description
Figure 1 is a schematic showing elements of a cigarette manufacturing
apparatus 100.
Apparatus 100 comprises a tobacco rod maker 101 and a cigarette assembly
machine 104.
As shown, cigarette assembly machine 104 comprises a modular apparatus, which
includes
a group 102 of modules 102a arranged in row, and a filter attachment unit 103.
As shown
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the modules 102a of Figure 1 are positioned between tobacco rod maker 101 and
filter
attachment unit 103, and receive tobacco rods directly from tobacco rod maker
101.
Modules 102 may be configured in different ways to provide different
manufacturing
options in which different types of cigarette are produced by apparatus 100.
Modules 102
may be reconfigured to produce different cigarette types by adding/removing
module(s),
repositioning modules relative to one another and/or reconfiguring individual
modules. In
this way, a flexible cigarette assembly machine is provided which facilitates
changes in the
type of cigarette produced.
Figures 1A, 2, 3 and 4 illustrate exemplary modules 1, 2, 3, 4, and Figures 7
and 8 illustrate
exemplary configurations of the modular apparatus 102, 103. The configuration
of Figure
7 forms cigarettes having triple-segment filters, discussed in more detail
below. The
configuration of Figure 8 forms cigarettes having an extendible filter,
discussed in more
detail below.
Figure IA shows a module 1 of a first type. The module 1 comprises a base unit
5, which
is fitted with a plurality of drums 6, 7, 8 for conveying rod articles through
the module 1.
The drums 6, 7, 8 include a takeover drum 6, a cutting drum 7 and a separating
drum 8.
The takeover drum 6 is configured to receive double-length tobacco rods from a
tobacco
rod making machine. The tobacco rods are conveyed by the takeover drum and
passed to
the cutting drum 7. As shown cutting drum 7 has a circular knife 7a configured
to cut each
double length rod into two tobacco rods, which are fed from the cutting drum
to
separating drum 8. Separating drum 8 is configured to longitudinally separate
the two
tobacco rods and then feed them out of the module 1. Separating drum 8 is of a
known
type having four segments on each side which have cam followers running in a
track cam.
The segments holding the tobacco rods can move from inner to outer position to
create a
gap between the tobacco rods.
Figure 2 shows a module 2 of a second type. As shown, this module 2 includes a
base unit
9, which is fitted with a feed drum 10, a cutting drum 11 and circular knife
11a, an
intermediate drum 12 and a separating drum 13. As shown, drums 10, 11, 12, 13
form a
conveyance path for rod articles through the module 2.
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The module 2 is configured to cut a central rod in a group of received rod
articles into two
segments, and to then separate the cut segments to form two spaced rod groups.
As illustrated in Figure 2a, the module 2 may receive two tobacco rods 14
together with a
centrally positioned filter rod 15, e.g. from a preceding module, such that
the three rods are
aligned with one another in a groove of the feed drum 10. In this case, the
feed drum 10
conveys the three aligned rods into a groove of cutting drum 11 in which the
central filter
rod 15 is cut into two segments 15a, 15b. The separating drum 13 then
separates the rods
into two groups such that each group includes one cut segment 15a, 15b and one
tobacco
rod 14. Both groups are then fed out of the module 2 by the separating drum
13.
In some exemplary configurations, rather than receiving two tobacco rods
together with a
single centrally positioned filter rod, the module 2 may alternatively be
configured to
receive two tobacco rods together with three filter rods positioned centrally
between the
tobacco rods. In this case, the cutting drum 11 may be configured to cut the
central filter
rod at a central point into two segments and the separating drum 12 may be
configured to
separate the rods into two groups such that each group includes one of the cut
segments,
one rod which has not been cut by the cutting drum 11, and one tobacco rod.
It will be appreciated that in other configurations, the module 2 may receive
two tobacco
rods together with five filter rods, or another odd number of filter rods. In
some
examples, the centrally positioned filter rod or rods may be attached to the
tobacco rods
(and/or one another) with one or more wrappers when received by the module 2.
In some embodiments, some or all of the filter rods may be multi-segment
filter rods.
Alternatively, the filter rods may be single-segment rods.
Figure 3 shows a module 3 of a third type. The module 3 of Figure 3 is the
same as the
module 2 of Figure 2, except that the module 3 further comprises a filter feed
mechanism
16. Thus, the same reference numerals are retained for corresponding features.
The
module 3 acts to receive two tobacco rods which are longitudinally separated
by a gap,
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insert a filter rod into the gap, cut the inserted filter rod into two
segments and then
separate the cut segments to form two spaced rod groups.
Suitable filter feed mechanisms 16 for the module 3 are known per se. For
example, feed
mechanisms from known "Max S" and "Max 90" machines may be used. The filter
feed
mechanism may be arranged to output a desired type of rod article, for example
2-up, or
alternatively 4-up filter rods. As shown in Figure 3, the feed mechanism 16
has an input 17
for receiving filter rods and an output 18 located for feeding filter rods
onto the feed drum
10. The filter feed may also include a cutting mechanism to cut each received
rod into filter
two rod segments, which are then fed onto the feed drum. For example, the
filter feed
mechanism may receive 4-up rods, cut each 4-up rod into two 2-up rods and then
feed
each 2-up rod onto the feed drum. Alternatively, the filter feed mechanism may
receive
filter rods of a different length, for example 6-up rods, and in some
configurations cut the
received rods to make segments of a desired length.
Thus, the module 3 may receive tobacco rods from a preceding module, and also
filter rods
from the feed mechanism 16. The tobacco rods are received on the feed drum
spaced by a
suitable gap, the gap being sized to receive a rod article from the feed
mechanism 16.
As illustrated in Figure 3a, in some configurations, a groove of the feed drum
10 may
receive two aligned tobacco rods 14 from a preceding module, the tobacco rods
being
separated by a gap. The filter feed mechanism may be configured to place a 2-
up filter 15
in the gap as the tobacco rods are being conveyed by the feed drum. The
cutting drum 11
is configured to cut the inserted filter rod 15 centrally and the separating
drum 12 is
configured to separate the rods into two groups such that each group includes
a filter
segment 15a and one tobacco rod 14. The two groups are then fed out of the
module 3.
In other configurations, the module 3 may receive two tobacco rods together
with two
filter rods from a preceding module so that the four rods are aligned in a
groove of the
feed drum 10. The rod articles may be received with a central gap sized for
receiving a
further "2-up" filter rod. In this case, the module 4 may be configured to 1)
insert a 2-up
filter in the gap, 2) cut the inserted filter rod into two rods and then 3)
separate the rods
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into two groups such that each group includes a cut segment of the inserted
rod, one of the
filter rods received from the previous module, and one of the tobacco rods.
Figure 4 shows a module 4 of a fourth type. As shown, the module 4 includes a
base unit
9, which is fitted with a filter feed 16, a feed drum 19, a swash plate drum
20, a rolling
drum 21, a roll hand 22, a transfer drum 23, a tipper unit 24 and a glue unit
25. The
module 4 is configured to insert a rod article such as a filter rod between
two received
tobacco rods, and to apply a wrapper in the form of a tipping paper.
As illustrated in Figure 4a, the feed drum 19 may receive two tobacco rods
from a
preceding module. The tobacco rods may be separated by a gap sized to receive
a "2-up"
filter rod. The filter feed is arranged to fit a 2-up filter rod into the gap.
The swash plate
drum 20, rolling drum 21, roll hand 22, tipper unit 24 and glue unit 25 then
cooperate to
wrap the three rods with a tipping paper to join them together, in a manner
which is well
known to those skilled in the art. In more detail, the swash plate drum acts
to
longitudinally compress the three rod articles, and a glue lined patch of
tipping paper is
then applied on the rolling drum to join the three rod articles together. The
joined group
of two tobacco rods and one double length filter rod are then fed out of the
module 4 by
the transfer drum 23.
As mentioned above, the tipper unit 24, glue unit 25 and rollhand 22 are well
known
components per se, but a brief description of these components will
nonetheless now be
given.
Tipper Unit
The tipper unit 24 has carbide knives cutting against a carbide drum, which
cuts the tipping
paper to a required length. The tipping patches are then transferred by the
carbide drum
(tipping drum) onto the cigarettes. The length of the tipping patches is
determined by the
feed roller which is mounted before the glue unit, and can be varied. The
patch length is
usually equal to the cigarette circumference plus about 2 mm. The tipper unit
can apply
.. patches of different widths depending on the width of the tipping paper
used.
Glue Unit
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The glue unit 25 includes a glue roller which runs in the glue. This roller
then transfers the
glue to the transfer roller. The paper runs over the transfer roller to
transfer the glue from
the roller to the paper.
Rollhand /rolling drum
The rollhand 22 is a static curved block which sits below the rolling drum 21.
When the
cigarettes, which are on the rolling drum, get to the entry point of the roll
hand a scraper
pushes the cigarette out of the groove and it is then rolled between the drum
and roll hand
till the cigarette falls into the next groove.
Rather than receiving two spaced tobacco rods, in some configurations the
module 4 may
receive two tobacco rods together with two filter rods, the rod articles being
received from
a preceding module. The received filter rods may be separated by a gap sized
to receive a
further 2-up filter. The feed mechanism 16 may be arranged to insert a 2-up
filter into the
gap. In this case the swash plate drum acts to compress the five rod articles
together and
the inserted rod is wrapped with a tipping paper on the rolling drum to join
it to the rods
received from the previous module.
In some configurations, the module 4 may apply tipping in two separated bands.
The
configuration for applying banded tipping is the same as for application of
conventional
tipping, but a slitting knife is also included to split the single tipping
band into 2 bands.
Also, paper guides are provided to open the two bands to the required
positions before
gluing. The tipping band is slit after the splicing unit and scraper (not
shown), at a position
before the glue applicator.
In embodiments, the filter rods which are inserted by the modules 2, 4 may
comprise
multiple segments, ie: they may comprise multi-segment rods formed for example
of a
central "double length" rod segment with two "single length" rod segments to
either side
of the central segment. Alternatively however, in some embodiments the filter
rods which
are inserted may be single-segment rods.
The modules described above may be linked together in different arrangements
to provide
different sequences of operations for forming the same or different types of
cigarettes.
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The final drum of one module may be aligned with the initial drum of the next
module so
that rods pass from the out-feed of one module to the in-feed of the next.
Still further flexibility can be achieved by reconfiguring individual modules.
The modules
2, 3 and 4 of Figures 2 to 4 share a base unit 9 having four drum-receiving
shafts, each
adapted for removably receiving a drum. Thus, each of the drums on the modules
2, 3 and
4 may be replaced with another suitable drum so as to vary the functionality
of the module.
For example, the cutting drum 11 of Figure 2 can be replaced with a transfer
drum or a
swash plate drum. The intermediate transfer drum 12 of Figure 2 can be
replaced with a
rolling drum, transfer drum, ejection drum, laser drum or other suitable drum.
Other
components may also be added/removed, for example a filter feed, tipper unit,
gluing unit,
rolling device and a laser for laser perforation.
The module 2 of the second type can thus be converted to a module 3 of the
third type by
a reconfiguration process comprising adding a filter feed 16. Furthermore, the
module 3 of
the third type can be converted to a module 4 of the fourth type by a
reconfiguration
process comprising replacing the cutting drum 11 with a swash plate drum 20,
replacing the
intermediate transfer drum 12 with a rolling drum 21, replacing the separating
drum 13
with a transfer drum, and adding the tipper unit 24, the glue unit 25 and the
roll hand 22.
In replacing a drum on the base unit 9, a replacement drum typically has the
same number
of grooves as the drum which it replaces. In Figures 2, 3, 4, the first drum
10, 19 may have
20 grooves, the second drum 11, 20 may have 20 grooves, the third drum 12, 21
may have
22 grooves and the fourth drum 13, 23 may have 20 grooves.
Figure 9 is a perspective view showing the base unit 9 fitted with a feed drum
19, swash
plate drum 20, roll drum 21 (and roll hand 22), and transfer drum 23. As
shown, each
drum 19, 20, 21, 23 is mounted on a shaft 19a, 20a, 21a, 23a which rotates the
drum. As
illustrated in Figure 10, each drum can be unscrewed and detached from its
shaft so that
another drum can be alternatively fitted.
As shown in Figures 9 and 10, the base unit 9 include a suction housing 200
which applies
suction for holding rod articles on the drums 19, 20, 21, 23 and for
transferring rod articles
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from one drum to the next. Referring to Figure 10, suction housing 200 is in
communication with suction control elements 201, which each have a suction
outlet 202
shaped to selectively apply suction to appropriate points during rotation of
the
corresponding drum.
Figure 11 is a schematic which illustrates with shading the regions in which
suction is
applied by the suction control elements, and the direction of rotation of the
drums 19, 20,
21,23.
Some drums may be replaced without changing the suction control element. For
example,
the intermediate drum 12 of the module 2 may be replaced by a cutting drum 11
without
changing the suction control element. In some cases however the suction
element may be
changed before a new drum is fitted.
Figure 12 shows the base unit 9 with drum 19 and its suction control element
201
removed, and with the suction housing 200 also removed. As shown, vacuum may
be
applied to suction housing 200 via a hole 203 in the base unit 9.
Figure 13 is a rear view of the base unit 9. As shown, the base unit includes
a gearbox 205
configured to turn the four drums synchronously. In use, one of the shafts is
driven by a
servo motor (not shown) to turn the drums.
Turning again to Figure 9, as shown the base unit 9 has a joining member 204
at either end
to overlap with complementary joining members on other modules. The joining
members
204 ensure that the final drum on one module is automatically aligned with the
first drum
of the next module when two modules are engaged together.
Figure 5 shows one possible configuration of modules 26, in which modules 2,
4, 3, 1 of
the second, fourth, third and first type are arranged one after the other in a
row. Each
module may include a gearbox configured to synchronise rotation of the module
drums,
and may have a servo motor to drive the drums. The servo motors of each module
may be
synchronised with one another so that rotation of all of the drums in a
particular
arrangement are synchronised. Other components, e.g: tipper unit, glue unit,
may be
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driven by further servo motors. These further servo motors may also be
appropriately
synchronised with the servo modules used to drive the module drums.
The combination of modules 26 may be linked to a filter attachment unit such
as a
modified Max S unit to carry out further processing. Figure 6a illustrates a
commercially
available Max S machine 27 and Figure 6b illustrates a modified machine 28
adapted for
use with the modules 1, 2, 3, 4. As shown, the modified machine 28 of Figure
6b differs
from the known machine 27 only in that the infeed section 27a is removed in
the modified
machine 28.
Since the modified unit 28 differs from the known unit 27 only by the absence
of the
infeed unit 27a, it will not be described in any further detail here.
Although Figure 6a and 6b show a modified Max S, any filter attachment unit
could
alternatively be linked to the modules, for example a commercially available
machine such
as a GD AF12 or a Max 90 unit modified in a similar manner as described above,
i.e.: by
removing the infeed section. Where a Max 90 is used for example, the modified
unit can
carry out all of the functions of a Max 90, which include: addition of a
filter rod, tipping
application and rolling, laser perforation, cutting, turning cigarettes,
inspections and a link-
up to a tray filler.
Figure 7 shows an arrangement of successive modules 29 linked to a modified
Max S unit
28 for making a particular type of cigarette. As shown, the arrangement 29
includes a
module 1 of the first type, a module 3 of the third type, a module 4 of the
fourth type and a
module 2 of the second type, arranged successively in a row and linked to a
modified Max
S unit 28. The first module 1 receives a "double length" tobacco rod from a
tobacco rod
maker (not shown), and the received tobacco rod is caused to undergo a
sequence of
operations in the modules 1, 3, 4, 2 and subsequently in the Max S unit 28 to
form a filter
cigarette 30. As shown in Figure 7a, the eventual cigarette 30 includes a
triple segment
filter and is wrapped with two separate tipping papers separated
longitudinally by a gap 31.
Figure 7a illustrates the sequence of operations carried out by the machinery
of Figure 7.
Each box in Figure 7a illustrates the operations which occur in one of the
modules. As
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shown, each box is labelled with the reference sign of one of the modules 1,
3,4, 2 to
indicate that the operations illustrated in the box occur in the referenced
module.
Referring to Figure 7a, in the module 1, a "double length" tobacco rod 32 is
received from
a tobacco rod maker (not shown) and cut into two equal segments 32a, 32b. The
two
segments are then separated and the separated segments are fed into the next
module 3.
In the module 3, a 2-up filter rod 33, supplied by the module's filter feed
mechanism, is
inserted in the gap between the two separated tobacco rods 32a, 32b received
from the
module 1. The filter 33 is then cut centrally into two segments 33a, 33b. A
first group 34a
comprising one tobacco rod 32a and one filter rod segment 33a is then
separated from a
second group 34b comprising one tobacco rod 32b and one filter rod segment
33b, and the
two separated groups 34a, 34b are fed onto the first drum of the next module
4.
In the next module 4, a further filter rod 35 is added in the gap between the
two separated
groups 34a, 34b. The module 4 then applies tipping in two separated bands 36a,
36b. The
first band 36a is wrapped around the tobacco rod 32a, the rod segment 33a and
the further
rod 35 to join these three rods together. The second band 3613 is wrapped
around the
tobacco rod 32b, the rod segment 33b and the further rod 35 to join these rods
together.
Thus, filter 35 is joined to a filter segment 33a from the first group 34a and
to a segment
33b from the second group 34b by wrapping with the bands 36a, 36b. The wrapped
rods
34a, 34b, 33a, 33b, 35 are then fed to the next module.
In the next module 2, the centrally positioned double length filter rod 35 is
cut into two
segments 35a, 35b. A first group of rods G1 comprising a filter rod segment
33a, a filter
rod segment 35a and a tobacco rod 32a is then separated from a second group of
rods G2
comprising a filter rod segment 33b, a filter rod segment 35b, and a tobacco
rod 32b. The
separated groups G1, G2 are then fed to the first drum of the modified Max S
machine 28,
as shown in Figure 7.
As illustrated in Figures 7 and 7a, the modified Max S unit has a filter feed
38 which inserts
a 2-up filter rod 37 between the group G1 and the group G2. The 2-up filter
rod 37 is then
joined to the filter rod segment 35a of the group G1 and to the filter rod
segment 35b of
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the group G2 by wrapping with a single wrapper 39. The wrapper 39 is sized so
that it
does not overlap with the bands 36a, 36b. Instead, the wrapper 39 is sized so
that there is a
gap 31 between each end of the wrapper 39 and the bands 36a, 36b.
The wrapped 2-up filter rod 37 is then cut centrally into two segments 37a,
37b to form
two cigarettes 30 which are turned so as to adopt a parallel configuration. As
shown, the
two cigarettes 30 are identical, and each includes three filter segments 37a,
35a, 33a and two
wrappers, the wrappers being longitudinally separated by a gap 31.
Figure 8 shows an alternative configuration 40 of successive modules for
making a
different type of cigarette 41. The eventual cigarette 41 is of the extendible
(telescopic)
type, in which two filters can be separated by a variable amount by sliding an
outer sleeve.
Telescope cigarettes are knownper se, from for example FR 1547656.
As shown, the configuration 40 comprises six modules 51, 52, 53, 54, 55, 56.
The first module 51 is the same as the module 1 of Figure 1A.
The second module 52 is the same as the module 4 of Figure 4.
The third module 53 comprises a modified version of the module 2 of Figure 2.
The third
module 54 is different to the module 2 of Figure 2 in that the first drum
(feed drum 10) has
been replaced with a cutting drum, the second drum (cutting drum 11) has been
replaced
with a separating drum, and the fourth drum (separating drum 13) has been
replaced with
an inspection drum to inspect for the presence of filters.
The fourth module 54 is the same as the module 4 shown in Figure 4.
The fifth module 55 comprises a modification of the module 4 shown in Figure
4. The
module 55 is different to the module 4 in that the filter feed 16 has been
removed and in
that the fourth drum (transfer drum 23) is replaced with a laser drum to form
perforations
in the cigarette.
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The sixth module 56 is a module comprising four drums 56a, 56b, 56c, 56d. The
first
drum 56a is a cutting drum, the second drum 56b is a transfer drum, the third
drum 56c is
a turning drum and the fourth drum 56d is an inspection drum configured to
perform a
leakage test on the cigarettes. The turning drum is known per se, and may be
configured to
turn the front row of cigarettes over to have the same orientation as the rear
row, or may
alternatively be configured to turn the rear row of cigarettes over to have
the same
orientation as the front row.
A further module may also be provided (not shown) including final end scanners
and an
ejection drum which serves as a link-up to further downstream machines.
Figure 8a illustrates the sequence of operations carried out the form the
cigarette 41. Each
box in Figure 8a illustrates the operations which occur in one of the modules
51, 52, 53, 54,
55, 56. As shown, each box is labelled with the reference sign of one of the
modules 51,
52, 53, 54, 55, 56 to indicate that the operations illustrated in the box
occur in the
referenced module.
As shown, the module Si is an infeed module configured to receive "double
length"
tobacco rods 60, for example from a tobacco rod maker. In the module 51, each
tobacco
rod 60 is cut into two segments 60a, 60b, which are separated and fed into the
next module
52.
The next module 52 is configured to insert a 2-up filter rod 61 between the
separated
tobacco rods received from the module 52, and to wrap the three rods 60a, 60b,
61 with a
wrapper 62 to join them together. The wrapped rods are then fed into the next
module 53.
The next module 53 is configured to cut the filter rod 61 into two segments
61a, 61b, and
to separate the segments to form two groups, each comprising a tobacco rod
60a, 60h
joined to a filter rod segment 61a, 61b. Each group forms an inner cigarette C
of an
eventual extendible cigarette 41. The inspection drum then carries out an
inspection for
the presence of filters. The separated inner cigarettes C are then fed to the
next module 54.
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The next module 54 is configured to insert a further filter rod 63 between the
filter
segments 61a, 61b and to wrap a wide tipping paper patch 64 around the tobacco
rods 60a,
60b, the filter rod segments 61a, 61b and the filter rod 63. The glue unit is
configured to
apply glue to the tipping patch 64 so that the tipping patch 64 is only glued
to the centre
filter rod 63 and on the overlap of the tipping, so as to form a tube which is
only attached
to the centre rod 63. The wrapped rods are then fed to the next module 55.
The next module 55 is configured to apply a further tipping patch 65 around
the tipping
patch 64 so that it overlaps with the tipping patch 64. The laser drum then
applies a
pulsed beam to make small perforations through the tipping layers 64, 65.
The next module 56 is configured to cut the filter 63, through the tipping
layers 64, 65 so
as to divide the filter 63 into two segments 63a, 63b and thus form two
extendible
cigarettes 41a, 41b. The turning drum then turns the two cigarettes 41a, 41b
so that they
are parallel to one another.
As described above, the inner cigarette C of each extendible cigarette 41a is
not glued to
the tipping layers 64, 65, so that the inner cigarette C can be slid in the
tube formed by the
tipping layers 64, 65 to vary the separation between the filter rod 61a, 61b
and the filter rod
63a, 63b.
The modules can be reconfigured to vary the cigarette assembly process as
desired, for
example by replacing one or more of the drums. Also, the modules can be
repositioned
relative to one another and/or one or more modules may be added/removed so as
to
provide yet further cigarette assembly options.
Many further modifications and variations are possible. For example, although
the module
1 of Figure 1A receives "double length" tobacco rods one at a time from a
tobacco rod
maker, in some example multiple "double length" tobacco rods may be received
at a time,
for example from a "double track" tobacco rod maker. Figure 14 shows a
variation of the
module 1 of the first type for use with a "double track" tobacco rod maker
which makes
two tobacco rods at a time. As shown, the modified module 1 of Figure 14 has a
modified
take over drum 6a for receiving the two tobacco rods, and two additional
intermediate
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transfer drums I1, 12. As shown, the takeover drum 6a has a plurality of
pivoted arms,
which each swing out sequentially in use to collect two tobacco rods from the
maker. As
the drum rotates further in an anticlockwise direction, the arms fall back
into position
against the drum. As illustrated in Figure 14, the arms then deliver tobacco
rods one at a
time to the first intermediate transfer drum Ii.
Other modules may also be included in certain configurations to carry out
other
operations. For example, a discharge module may be included in some
arrangements to
discharge assembled rod articles at different heights. The discharge module
may be
configured to discharge rods articles at a particular height for linking to a
mass flow feed,
for example to a conveyor to carry discharged rod articles to further
machinery for further
processing. Alternatively, the discharge height may be varied when discharge
to a
packaging machine is required, or when discharge to a tray filler for storage
is required.
Further, although coupling filter rods to tobacco rods is described above, in
some
configurations a module may insert a component other than a filter rod, e.g: a
rod article
such as a tobacco rod, or a rod element comprising one or more plastic
elements, e.g:
twistable elements having first and second parts which can be rotated relative
to one
another to change the characteristics of a smoking article, as described for
example in
EP0395291A1.
According to various embodiments of the present invention, modules may carry
out one or
more of the following operations: transfer, insert separate, wrap, rotate,
inspect, reject,
press-together, laser-cut, turn, sample cigarettes for test, roll tipping. In
embodiments,
each module carries out two or more of these operations. Each individual
operation may
be carried out by a single functional unit (e.g: by a single drum).
As will be appreciated from the foregoing, the drums of the modules may be
selected so
that each module carries out a selected sequence of assembly operations. Also,
the number
of modules and their relative position may be chosen so that the modules carry
out their
respective assembly operations sequentially in a selected order.
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In order to address various issues and advance the art, the entirety of this
disclosure shows
by way of illustration various embodiments in which the claimed invention(s)
may be
practiced and provide for superior apparatus and methods. The advantages and
features of
the disclosure are of a representative sample of embodiments only, and are not
exhaustive
and/or exclusive. They are presented only to assist in understanding and teach
the claimed
features. It is to be understood that advantages, embodiments, examples,
functions,
features, structures, and/or other aspects of the disclosure are not to be
considered
limitations on the disclosure as defined by the claims or limitations on
equivalents to the
claims, and that other embodiments may be utilised and modifications may be
made
without departing from the scope and/or spirit of the disclosure. Various
embodiments
may suitably comprise, consist of, or consist essentially of, various
combinations of the
disclosed elements, components, features, parts, steps, means, etc. In
addition, the
disclosure includes other inventions not presently claimed, but which may be
claimed in
future.
Date Recue/Date Received 2022-11-28
